Floor-board clamp



A. B. PATTEN & F. E. SPRAGUE.

FLOOR BOARD GLAMP'. No. 311,029. Patented Jan. 20, 1885.

WITNESSES N. PETERS. Pmm-ulhd m har. Washington. a, c.

' EUNETED STATES Parana @rrrcn.

ALBERT l3. PATTEN AND. FREDERICK E. SPRAGUE, OF CORINNA, MAINE.

FLOOR-BOARD CLAMP.

SPECIFICATION forming part of Letters Patent No. 311,029, dated January20, 1885.

Application filed November 13, 1884. No model To all whom it mayconcern:

Be it known that we, ALBERT B. PATTEN and FREDERICK E. SPRAGUE, citizensof the United States of America, residing at Corinna, in the county ofPenobscot and State of Maine, have invented certain new and usefulImprovements in Floor-Board Clamps; and we do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to letters or figures of reference marked thereon, which form a partof this specification.

Our invention relates to an improved device for setting floor-boards andholding the same in place while being nailed in position; and itconsists in the construction and combination of the parts,as will behereinafter fully set forth, and pointed out in the claims.

In the accompanying drawings,which illustrate our invention, Figure l isa perspective view; Fig. 2, a transverse section; Fig. 3, a section onthe line :r 00 of Fig. 2, and Fig. 4 a sectional view taken on the liney y of Fig. 3.

A represents a metallic frame, which consists, essentially, of an archedplate,which has rigidly attached at one end a flat bar, a, which extendshorizontally from the arch and projects on each side of the same, saidbar being provided on its under side with teeth or pins or. The oppositeend of the arch is pro vided with a vertical bar, I), which is providedwith perforations b, as shown, through which pass rods which areattached to the presserbar B and to the bar 0, attached to the togglejoint, as will be hereinafter fully set forth. The arched plate A isprovided, centrally, with a portion, A, of increased thickness, which isprovided with a perforation, 0, having a female screw-thread, throughwhich perforation passes a screw-threaded rod, D, which has attached atits upper end a handwheel, d. The lower end of the screw-threaded rod Dis recessed circumferentially, and with said recess engages a pin, 0,which passes through the upper part of a socket, 0, attached to theplate E, which plate extends on each side of the socket, as shown.

Hinged to the lower inner end of the arch A adjacent to the bar a is themember f of the togglejoint F, the opposite member, f, of thistoggle-joint being hinged to the central portion of the bar 0. Thesemembers f f of the toggle-joint are provided at their ends adjacent towhere they are hinged together with upwardly-projecting ears 9, whichears project from the edges of the bars, and they are provided at theirupper ends with transverse pins or rods 9, under which the plate E islocated. The members of the toggle-joint be tween the ears and adjacentto the hinge are provided with upwardly-projecting portions h, which arerounded on their upper surface, and against which the lower edge of theplate E will abut when the toggle-joint is being depressed.

It'will be readily seen from the construction hereinbefore describedthat when the screw-'threaded'rod is turned so as to raise the plate Ethe same will engage with the pins or rods 9, thus elevating the togglejoint and retracting the presser-foot B.

\Vhen it is desired to force the presser-foot against the board, thescrew-threaded rod is turned so that the plate E will contact with theprojections h on the members of the toggle-j oint, and as saidtoggle-joint is depressed the presser-bar B will be forced outwardly, soas to bring the board in position.

We claim-- 1. In a device for tightening floor-boards, constructedsubstantially as shown and described, a toggle-joint, F, hinged at oneend to the frame,the members thereof being provided withupwardly-projecting ears and cross-bars g, in combination with ascrew-threaded rod having the plate E attached thereto, the parts beingorganized substantially as shown,and for the purpose set forth.

2. In a device for tightening floor-boards, the arched frame having ahorizontal end with projecting pins and a vertical end withperforations, said arch being provided centrally with a screw-threadedrod having at one end a hand-wheel and at its opposite end a socketedplate, E, in combination with a togglejoint hinged to the inner side ofthe end of the arched frame, and provided centrally withupwardly-projecting ears having trans- In testimony whereof we affix oursignatures verse bars 9 and projections h h, the free in presence of twowitnesses. end of said t0 1e oint bein attached to a 1 transverse barfiz ivi g rods which pass through i 5 the perforations Z), and areattached at their 1 outer ends to the pressing-bar, the parts be-Vitnesses: ing organized substantially as shown, and for 11 D. MEIGS,the purpose set forth. P. L. LOWELL.

